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Trustonic

Senior UI Developer

Trustonic

Senior UI Developer at Trustonic creating high-performance user interfaces for telecoms platform. Collaborating with teams to deliver seamless and scalable solutions in a remote role.

Posted 5/15/2026full-timeRemote • Winnersh • 🇬🇧 United KingdomSeniorWebsite

Tech Stack

Tools & technologies
ApolloAWSCloudGraphQLJestReactSCSSTypeScript

About the role

Key responsibilities & impact
  • Take a leading role in building and evolving our operator web portal for a next-generation telecoms platform.
  • Create intuitive, high-performance user interfaces that power device lifecycle management at scale—working at the intersection of frontend engineering, real-time data, and secure cloud integrations.
  • Shape the user experience across a complex SaaS platform, collaborating closely with backend engineers and product teams to deliver seamless, scalable solutions.
  • Translate sophisticated platform capabilities into elegant, usable interfaces for customers.
  • Build Modern Web Experiences by designing, developing, and maintaining a React 18-based operator portal, delivering responsive and intuitive user interfaces.
  • Develop and maintain scalable component libraries using Ant Design, ensuring consistency and reusability across the platform.
  • Work with AWS AppSync GraphQL APIs and Cognito authentication flows to deliver secure, real-time user experiences.
  • Implement efficient data-fetching and state management patterns (e.g., React Query, Zustand) for real-time device data.
  • Optimise applications for speed and scalability through code-splitting, lazy loading, and caching strategies.
  • Partner with backend engineers on API design and schema evolution, and contribute to UX and design discussions.
  • Write robust unit and integration tests using Jest and React Testing Library, and contribute to code reviews and best practices.
  • Ensure applications meet high standards for responsiveness, cross-browser compatibility, and accessibility.

Requirements

What you’ll need
  • Strong commercial experience building production-grade React applications
  • Proven experience working with GraphQL APIs (AppSync, Apollo, or similar)
  • Experience implementing authentication flows (e.g., AWS Cognito, OAuth2/OIDC)
  • Solid experience using TypeScript in a React codebase
  • Familiarity with component libraries such as Ant Design, MUI, or similar
  • Deep understanding of React 18 (hooks, context, performance optimisation)
  • Strong skills in TypeScript, including generics and scalable typing patterns
  • Experience with modern tooling such as Vite or equivalent
  • Knowledge of state management patterns (React Query, Zustand, or similar)
  • Strong CSS/SCSS skills including responsive design (flexbox, grid)
  • Experience with testing frameworks like Jest and React Testing Library
  • Nice to Have: Experience with multi-tenant SaaS platforms at scale
  • Familiarity with AWS services (AppSync, Cognito, S3, CloudFront)
  • Understanding of web performance optimisation techniques
  • Awareness of accessibility standards (WCAG)
  • Experience working with design systems and UX best practices
  • Thrive in a fast-paced, collaborative engineering environment
  • Strong attention to detail and passion for building high-quality user experiences
  • Comfortable working across teams and contributing to shared solutions
  • Proactive, organised, and able to take ownership of frontend systems
  • Curious and motivated to continuously improve tools, patterns, and practices
  • A degree in computer science, software engineering, or equivalent experience
  • AWS certification is desirable but not essential

Benefits

Comp & perks
  • Competitive compensation
  • A base salary that reflects your expertise and impact.
  • Bonus scheme to share in our success.
  • Immediate participation in our pension scheme.
  • Private medical insurance for you and your family from day one.
  • Income protection and life insurance for peace of mind.
  • Remote/hybrid working arrangements to support your lifestyle.
  • An open holiday policy with no upper limit—take the time you need, when you need it.
  • Support for volunteering and causes that matter to you.
  • Opportunities for professional development and career progression.
  • Exposure and interaction with global teams.
  • A commitment to diversity, equity, and inclusion.
  • A collaborative environment where your voice is valued and your wellbeing is prioritised.
  • The chance to work on technology that drives global economic inclusion and makes a real difference in people’s lives.

ATS Keywords

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Hard Skills & Tools
React 18GraphQLTypeScriptAnt DesignCSSSCSSJestReact Testing LibraryAWS CognitoVite
Soft Skills
attention to detailcollaborationownershipproactiveorganisedcuriositymotivationcommunicationUX best practicesfast-paced environment
Certifications
AWS certificationdegree in computer sciencedegree in software engineering